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5. Operation
Operating conditions
5.1.1 Operating conditions, ALPHA2 15-55
and ALPHA1 15-55 models
Supply voltage
1 x 115 V, + 10 %/- 10 %, 60 Hz
Motor protection
The pump requires no external motor protection.
Enclosure class
Indoor use only, IP42.
CSA enclosure type 2.
Insulation class
F
Relative humidity
Maximum 95 %
Maximum outlet pressure
150 psi (10.34 bar)
Inlet pressure
Liquid temp. Min. inlet press.
[°F (°C)] [psi (bar)]
167 (75) 0.75 (0.05)
194 (90) 4.06 (0.28)
230 (110) 15.7 (1.08)
Sound pressure level
43 dB (A)
Ambient temperature
32 °F (0 °C) to 104 °F (40 °C)
Liquid temperature
36 °F (2 °C) to 230 °F (110 °C)
In domestic hot water systems, keep the liquid temperature
below 149 °F (65 °C) to eliminate the risk of lime
precipitation.
To avoid condensation in the control box and stator, the
liquid temperature must always be higher than the ambient
temperature:
Ambient temp.
Min. liquid temp. Max. liquid temp.
[°F (°C)] [°F (°C)] [°F (°C)]
32 °F (0 °C) 36 °F (2 °C) 230 °F (110 °C)
50 °F (10 °C) 50 °F (10 °C) 230 °F (110 °C)
68 °F (20 °C) 68 °F (20 °C) 230 °F (110 °C)
86 °F (30 °C) 86 °F (30 °C) 230 °F (110 °C)
95 °F (35 °C) 95 °F (35 °C) 194 °F (90 °C)
104 °F (40 °C) 104 °F (40 °C) 158 °F (70 °C)
Watt readings
Accuracy: ± 1 watt.
Flow indicator
Provides a relative indication of flow – should not be used in
lieu of a flow meter.
Check valve
Use of a check valve may reduce pump hydraulic
performance. Use a check valve in parallel pumping
applications.
Approximate power usage, ALPHA2 15-55
Speed setting Min. [W] Max. [W]
Constant speed III
(High)
39 45
Constant speed II
(Medium)
15 30
Constant speed I (Low) 5 8
Constant pressure I 8 45
Constant pressure II 14 45
Constant pressure III 22 45
AUTOAdapt 5 45
Approximate power usage, ALPHA1 15-55
Speed setting
Min. [W] Max. [W]
Constant pressure III 39 45
Constant pressure II 14 45
Constant pressure I 8 45
ALPHA
5
18
Operation